Now to understand how this is possible you’re going to have to stick with us because this is where things start to get a little weird.

The whole process is based on a theory known as quantum entanglement.

Quantum entanglement describes how two objects, in this case photons, can be created at the exact same time and point in space and share the same quantum state.

These two objects are now inexorably linked which means that even if you split them apart over extremely long distances you can alter the state of one and it will be perfectly mimicked on the other because they are, and this is where your brain might hurt, the same photon.